**Project Link:** https://wokwi.com/projects/333785509332517459?gh=1

Error message: DEFINE_PIN(RX);
^
int
/sketch/gps-fake.chip.c:12:12: error: a parameter list without types is only allowed in a function definition
DEFINE_PIN(RX);
           ^
/sketch/gps-fake.chip.c:13:1: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
DEFINE_PIN(TX);
^
int
/sketch/gps-fake.chip.c:13:12: error: a parameter list without types is only allowed in a function definition
DEFINE_PIN(TX);
           ^
/sketch/gps-fake.chip.c:14:1: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
DEFINE_PIN(VCC);
^
int
/sketch/gps-fake.chip.c:14:12: error: a parameter list without types is only allowed in a function definition
DEFINE_PIN(VCC);
           ^
/sketch/gps-fake.chip.c:15:1: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
DEFINE_PIN(GND);
^
int
/sketch/gps-fake.chip.c:15:12: error: a parameter list without types is only allowed in a function definition
DEFINE_PIN(GND);
           ^
/sketch/gps-fake.chip.c:112:13: error: parameter 'chip_timer_event' was not declared, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
void EXPORT(chip_timer_event)(chip_state_t *chip, uint32_t timer_id) {
            ^
/sketch/gps-fake.chip.c:112:12: error: function cannot return function type 'void (chip_state_t *, uint32_t)' (aka 'void (chip_state_t *, unsigned int)')
void EXPORT(chip_timer_event)(chip_state_t *chip, uint32_t timer_id) {
           ^
/sketch/gps-fake.chip.c:113:7: error: use of undeclared identifier 'timer_id'
  if (timer_id == chip->tx_timer) {
      ^
/sketch/gps-fake.chip.c:113:19: error: use of undeclared identifier 'chip'
  if (timer_id == chip->tx_timer) {
                  ^
/sketch/gps-fake.chip.c:114:39: error: use of undeclared identifier 'chip'
    const char *message = gps_tx_data[chip->gps_tx_index++];
                                      ^
/sketch/gps-fake.chip.c:115:38: error: call to undeclared library function 'strlen' with type 'unsigned long (const char *)'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    uart_write(chip->uart0, message, strlen(message));
                                     ^
/sketch/gps-fake.chip.c:115:38: note: include the header <string.h> or explicitly provide a declaration for 'strlen'
/sketch/gps-fake.chip.c:115:16: error: use of undeclared identifier 'chip'
    uart_write(chip->uart0, message, strlen(message));
               ^
/sketch/gps-fake.chip.c:116:9: error: use of undeclared identifier 'chip'
    if (chip->gps_tx_index >= LEN(gps_tx_data)) {
        ^
/sketch/gps-fake.chip.c:117:7: error: use of undeclared identifier 'chip'
      chip->gps_tx_index = 0;
      ^
/sketch/gps-fake.chip.c:112:6: error: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Werror,-Wdeprecated-non-prototype]
void EXPORT(chip_timer_event)(chip_state_t *chip, uint32_t timer_id) {
     ^
/sketch/gps-fake.chip.c:122:7: error: conflicting types for 'chip_init'
void* chip_init(void) {
      ^
/src/wokwi-api.h:45:54: note: previous declaration is here
extern __attribute__((export_name("chipInit"))) void chip_init(void);
                                                     ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.

Error: Process exited with 1/*
  GPS Fake using custom chip
  by Anderson Costa

  GPS NMEA 0183 Messaging Protocol 101
  https://docs.arduino.cc/learn/communication/gps-nmea-data-101


  NMEA Generator
  https://www.nmeagen.org/
*/

#include "NMEA.h"

#define LEN(arr) ((int)(sizeof(arr) / sizeof(arr)[0]))

union {
  char bytes[4];
  float valor;
} velocidadeGPS;

float latitude;
float longitude;

// Creates a GPS data connection with sentence type GPRMC
NMEA gps(GPRMC);


void setup() {
  Serial.begin(9600);
  Serial1.begin(4800); // Serial1 is connected to the custom chip
  Serial.println("Data received from GPS Fake:");
}

void loop() {
  // Waits for serial port data
  while (Serial1.available()) {
    // Receives data from GPS serial port
    char serialData = Serial1.read();
    Serial.print(serialData);

    // Checks if the GPS sentence is valid
    if (gps.decode(serialData)) {
      // Checks if GPS status is 'A'
      if (gps.gprmc_status() == 'A') {
        // Receives GPS speed in km/h
        velocidadeGPS.valor = gps.gprmc_speed(KMPH);
      } else {
        velocidadeGPS.valor = 0;
      }

      latitude = gps.gprmc_latitude();
      longitude = gps.gprmc_longitude();

      // Add line break
      Serial.println();
      Serial.println();

      // Show Latitude
      Serial.print(" Latitude: ");
      Serial.println(latitude, 8);

      // Show Longitude
      Serial.print("Longitude: ");
      Serial.println(longitude, 8);

      // Show Speed ​​in km/h
      Serial.print("    Speed: ");
      Serial.print(velocidadeGPS.valor);
      Serial.println(" Km/h");

      // Converts Geographic Coordinates to Cartesian Plane
      convertCoordinatesToCartesian(latitude, longitude);
    }
  }
}

void convertCoordinatesToCartesian(float latitude, float longitude) {
  // Convert from Degrees to Radians
  float latRadius = latitude * (PI) / 180;
  float lonRadius = longitude * (PI) / 180;

  int earthRadius = 6371; // Radius in km

  float posX = earthRadius * cos(latRadius) * cos(lonRadius);
  float posY = earthRadius * cos(latRadius) * sin(lonRadius);

  Serial.print("        X: ");
  Serial.println(posX);

  Serial.print("        Y: ");
  Serial.println(posY);
}